Lightcone framed curves in the Lorentz-Minkowski 3-space
TURKISH JOURNAL OF MATHEMATICS(2024)
摘要
For a nonlightlike nondegenerate regular curve, we have the arc -length parameter and the Frenet-Serret type formula by using a moving frame like a regular space curve in the Euclidean space. If a point of the curve moves between spacelike and timelike regions, then there is a lightlike point. In this paper, we consider mixed types of not only regular curves but also curves with singular points. In order to consider mixed type of curves with singular points, we introduce a frame, so-called the lightcone frame, and lightcone framed curves. We investigate differential geometric properties of lightcone framed curves.
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关键词
Mixed type,lightcone framed curve,curvature,singular point
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